When you are dealing with a number of variables and relations between them.
Yes,Pakistan have a class system
There is a code system to classify a business by the type of activity that the business is engaged. So as to find the right business code number, one should use this code system.
pakistan
Pakistan's system can be improved if an Islamic leader become the prime minster
name the different types of Irrigation system in Pakistan?
becos Pakistan is dry
Pakistan is a postcolonial state and still following the colonial system
This question actually poses more questions : What time period? What type of business? (meaning, are you specifically concerned with the exchange of services of some kind for monies/valuables or simply a barter system?)
rupee
An example of contemporary use of real number system in business is a mathematician which his/her job is to come up with the next numbers in the number line which still doesn't have an end. So mathematician will use a number line everyday that they work.
All it is is the math metric system